Diffusive reflectance for the free-space light propagation theory

2010 ◽  
Vol 96 (1) ◽  
pp. 013702 ◽  
Author(s):  
Yuanzheng Si ◽  
Heng Mao ◽  
Bin Zhang ◽  
Ming Jiang
Keyword(s):  
Free Space ◽  
Light Propagation ◽  
Propagation Theory

Light propagation: beams and guides

Optics f2f ◽  
2018 ◽  
pp. 177-194
Author(s):  
Charles S. Adams ◽  
Ifan G. Hughes
Keyword(s):  
Free Space ◽  
Light Propagation ◽  
Laser Beams ◽  
Optical Fibres

This chapter considers the propagation of laser beams in free space and laser cavities, and light propagating in waveguides such as optical fibres.

Soliton-Like Light Propagation through Coupled Resonators Constructed with Periodic Metal-Dielectric Layers

2013 ◽  
Vol 339 ◽  
pp. 706-713
Author(s):  
Yu Guang Zhu ◽  
Yun Tuan Fang ◽  
Wei Li Hu ◽  
Wei Zhong Yan
Keyword(s):  
Group Velocity ◽  
Free Space ◽  
Light Propagation ◽  
Tight Binding ◽  
Coupled Resonators ◽  
Light Velocity ◽  
One Dimensional ◽  
Resonator Structure ◽  
Transmission Mechanisms ◽  
Dielectric Layers

in order to obtain a soliton-like light propagation, we design a coupled resonator structure constructed with one-dimensional periodic metal-dielectric layers. Through tight-binding analysis and the Blochs theorem, we study its transmission mechanisms. Basing on the transmission mechanisms, we achieve a soliton-like light propagation in it with a group velocity being smaller light velocity in free space.

On Mechanics of Light Propagation in Free Space with Final Temperature

2007 ◽  
Vol 3 (2) ◽  
pp. 220-231
Author(s):  
M. Ja. Ivanov ◽  
V.K. Mamaev
Keyword(s):  
Exact Solutions ◽  
Free Space ◽  
Electromagnetic Waves ◽  
Light Propagation ◽  
Longitudinal Component ◽  
Final Temperature ◽  
Final Density ◽  
Propagation Of Light ◽  
Waves Propagation ◽  
Modified Theory

Features of electromagnetic waves propagation of light range are considered in free space with final temperature 2.725K. The presence in space of temperature (and final density) allows justification to introduce the longitudinal component of electromagnetic field. A modified theory of electromagnetic waves propagation in free space is offered.  Exact solutions of the nonlinear equations system in the presence of electric and gasdynamic interaction are obtained. Some of demonstrated exact solutions have a nature of continues and decretive spectrum.

scholarly journals Shaping complex microwave fields in reverberating media with binary tunable metasurfaces

2014 ◽  
Vol 4 (1) ◽  
Author(s):  
Nadège Kaina ◽  
Matthieu Dupré ◽  
Geoffroy Lerosey ◽  
Mathias Fink
Keyword(s):  
Free Space ◽  
Light Propagation ◽  
Good Control ◽  
Spatial Light Modulators ◽  
Scattering Media ◽  
Energy Feedback ◽  
Light Modulators ◽  
Receiving Antenna ◽  
Order Of Magnitude ◽  
Electronically Tunable

Abstract In this article we propose to use electronically tunable metasurfaces as spatial microwave modulators. We demonstrate that like spatial light modulators, which have been recently proved to be ideal tools for controlling light propagation through multiple scattering media, spatial microwave modulators can efficiently shape in a passive way complex existing microwave fields in reverberating environments with a non-coherent energy feedback. Unlike in free space, we establish that a binary-only phase state tunable metasurface allows a very good control over the waves, owing to the random nature of the electromagnetic fields in these complex media. We prove in an everyday reverberating medium, that is, a typical office room, that a small spatial microwave modulator placed on the walls can passively increase the wireless transmission between two antennas by an order of magnitude, or on the contrary completely cancel it. Interestingly and contrary to free space, we show that this results in an isotropic shaped microwave field around the receiving antenna, which we attribute again to the reverberant nature of the propagation medium. We expect that spatial microwave modulators will be interesting tools for fundamental physics and will have applications in the field of wireless communications.

scholarly journals Safe range of free space light propagation calculation in single precision

2015 ◽  
Vol 23 (3) ◽  
pp. 3260
Author(s):  
Petr Lobaz ◽  
Petr Vaněček
Keyword(s):  
Free Space ◽  
Light Propagation ◽  
Single Precision

scholarly journals Study on Optical Properties of Milk based on Light Propagation Theory

2021 ◽  
Vol 2071 (1) ◽  
pp. 012006
Author(s):  
N A I Muhamad Kamil ◽  
W Z Wan Ismail ◽  
S R Balakrishnan ◽  
M Sahrim ◽  
I Ismail ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Optical Properties ◽  
Light Propagation ◽  
Mie Scattering ◽  
Monte Carlo Algorithm ◽  
Theoretical Modelling ◽  
Propagation Theory ◽  
Infra Red ◽  
Light Absorbance ◽  
Modelling Methods

Abstract The light propagation in milk based on experimental and theoretical analysis is reviewed. The review is done on light propagation theory which consists of light absorbance, reflection, and scattering. The study covers on types of milk, milk quality and modelling methods based on Mie scattering and Monte Carlo algorithm. The experiments consist of spectrometry methods where visible (VIS) and near infra-red (NIR) are used. Many spectrometry experiments and theoretical modelling are discussed to observe and analyse optical properties of milk.

scholarly journals Implementation of a Phase Only Spatial Light Modulator as an Atmospheric Turbulence Simulator at 1550 nm

2014 ◽  
Vol 2014 ◽  
pp. 1-8
Author(s):  
Carlos Font ◽  
Freddie Santiago ◽  
G. Charmaine Gilbreath ◽  
David Bonanno ◽  
Blerta Bajramaj ◽  
...  
Keyword(s):  
Atmospheric Turbulence ◽  
Free Space ◽  
Spatial Light Modulator ◽  
Light Propagation ◽  
New Technologies ◽  
Short Wave ◽  
Controlled Environment ◽  
Light Modulator ◽  
Propagation Of Light ◽  
Laser Communications

Modeling and simulating atmospheric turbulence in a controlled environment have been a focus of interest for scientists for decades. The development of new technologies allows scientists to perform this task in a more realistic and controlled environment and provides powerful tools for the study and better understanding of the propagation of light through a nonstatic medium such as the atmosphere. Free space laser communications (FSLC) and studies in light propagation through the atmosphere are areas which constantly benefit from breakthroughs in technology and in the development of realistic atmospheric turbulence simulators, in particular (Santiago et al. 2011). In this paper, we present the results from the implementation of a phase only spatial light modulator (SLM) as an atmospheric turbulence simulator for light propagation in the short-wave infrared (SWIR) regime. Specifically, we demonstrate its efficacy for its use in an FSLC system, at a wavelength of 1550 nm.

scholarly journals Reciprocating propagation of laser pulse intensity in free space

2021 ◽  
Author(s):  
Zhaoyang Li ◽  
Yanjun Gu ◽  
Junji Kawanaka
Keyword(s):  
Free Space ◽  
Light Propagation ◽  
Coherent Control ◽  
Radiation Force ◽  
Longitudinal Axis ◽  
Longitudinal Effects ◽  
Pressure Experiment ◽  
Potential Applications ◽  
Control Light ◽  
Backward Propagation

Abstract The constant-speed straight-line propagation in free space is a basic characteristic of light. Recently, several novel spatiotemporal coupling methods, for example, flying focus (or named sliding focus), are developed to control light propagation including velocity and direction. In the method of flying focus, where temporal chirp and longitudinal chromatism are combined to increase the degree of freedom for coherent control, tunable-velocities and even backward-propagation have been demonstrated. Herein, we studied the transverse and longitudinal effects of the flying focus in space and time, respectively, and found in a specific physics interval existing an unusual reciprocating propagation that was quite different from the previous result. By significantly increasing the Rayleigh length in space and the temporal chirp in time, the newly created flying focus can propagate along a longitudinal axis firstly forward, secondly backward, and lastly forward again, and the longitudinal spatial resolution for a clear reciprocation flying focus improves with increasing the temporal chirp. When this new type of light is applied in the radiation pressure experiment, a reciprocating radiation-force can be produced in space-time accordingly. This finding further extends the control of light and might enable important potential applications.

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